Frequent interrruptions The laptop switches off frequently but with no particular regular trend.Sometimes it turns itself off after being on for 1/2 hour .Other times it lasts for two hours.This happens even when working with AC power.

Initially, I would suspect the battery (even when plug to the AC). To confirm, pls try running without the battery and purely on AC adapter. Alternately, it could be a loose component internally such as the memory, LAN or WiFi card and in some models, video card. In my Toshiba, it turned out that the WiFi was consuming too much power that it discharges the battery rapidly and the charger was having a hard time coping up. My solution was to turnoff the built-in WiFi and install a D-Link USB.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

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I think the problem might be in your laptop screen,did you try to turn it on in different positions,I mean the part between keyboard and screen might be broken.I suggest you first reinstall windows/mac or whatever,then try in different positions(move you'r screen up down),and if nothing work,take it on service :/

Probably the problem comes up with two different reasons. 1st is Horizontal control section in LCD may failed or in irrecoverable situation. 2nd is display drivers crashed or not supporting the laptop.

Frequent Charging Shortens Battery Life Frequent charging shortens the life span of a Lithium ion battery. Batteries should be charged only after they expend all their power. b> Switching Batteries Switching batteries helps preserve battery life: If a cell phone or computer user puts in a spare battery while separately charging the primary Lithium ion battery, that helps extend the life of both batteries. b> Removing BatteriesMost laptops charge the battery when a user plugs in the AC adapter. Users can adjust this setting by changing the power options. Windows places this option in the Control Panel, while the Gnome Linux desktop places power options under "Administrative Tools". Cell phones incorporate their own power-saving features that the user usually cannot control. b> When to Replace a Lithium Ion BatteryIf a laptop battery does not hold a charge for more than a few minutes, a user must replace the Lithium ion battery if he wants to use the computer without an AC adapter. b> Other Ways to Extend Battery LifeStoring a battery in a cool, dry environment causes a lithium-ion battery to last a little longer and reduces the frequency of needed battery replacements. Battery Bar - Free version availablehttp://osirisdevelopment.com/BatteryBar/index.html

Here you will have to check "Restore computer to an earlier time' and
click Next

Now you will find one Month Calendar window with Dates below, go to
the previous month by clicking the '<' sign in the upper left hand
corner of the Month Calendar and select any date that you see in Bold.

Note:
It is better if you could remember from which date you are facing the issue,
try to select a date prior to that date.

The
detail of that particular date should show "System Checkpoint" and
time on the right hand side box. Select that date.

Now, Click on Next and System Restore will start and windows will take a
reboot.

hi there, my sisters dell laptop does the same thing. My best guess is that a hard knock on the graphics card and knocked a few pins out of it. This is something that a average person can not do. My suggestion is to bring it to a computer shop and tell them that you think it's the monitor connections.

To determine if the LCD screen is faulty ot the video card, connect an external monitor to the laptop's video port. Power up the external monitor first and the boot up the laptop. The video image should automatically switch to the external monitor. If you don't get flashes on the monitor then the video card is OK and the fault lies with the LCD screen.
Flashes coud be caused by a faulty inverter or a faulty CCFL lamp.
A fault is usually easier to diagnose when it is not intermitten.

Give the vents round the side and underneath a hoover out first, then check in acer e manager, there you should see settings for your fan, HDD and hibernation , you can set the fan on all the time or default, check it's set correctly and see if you resolve the issue.
Turn hibernation off and HDD idle shutdown off to see if any change in shutdown.
Does the pc shut down in any particular programme?